ci: test action added

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+name: Run tests
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Upgrade pip
+        run: python -m pip install --upgrade pip setuptools
+      - name: Install dependencies
+        run: |
+          pip install 'tutor[dev]>=16.0.0,<17.0.0'
+      - name: Test lint, types, and format
+        run: make test